Improvement in automatic mixing-valves for gas-machines



L. n. rows uzv, Automatic Mixing-Valve for Gas-Machines.

No.l65.l88.

Patented July 6,1875.

NITED Srarns ATENT OFFIon.

LOVIAS D. 'TOWSLEY, OF CINCINNATI, OHIO.

IMPROVEMENT IN AUTOMATIC MIXING-VALVES FOR GAS-MACHINES.

Specification forming part of Letters Patent No. 165,] 38, dated July 6,1875; application filed May 4, 1875.

for operating the valve, and Fig. 3 is the cutoff for the air-valve,detached.

Similar letters of reference indicate like parts.

The nature of my invention relates to that class of gas-machines inwhich hydrocarbons are brought to a vapor under pressure and then mixedwith atmospheric air to form illuminating-gas. It consists mainly in adouble valve, one portion admitting oil-vapor and the other air. Itfurther consists in. a device whereby the valve is opened or closedinstantaneously, receiving its motion from that of any suitablereciprocating part of the machine, such as the gas-holder, &c.

In construction my invention is as follows: A is the main part of thestructure, being eularged below and changing its cavity from a verticalto a horizontal direction. Above, it receives the air-pipe B. O is themixing-bulb, which continues on horizontally in a small straightcylinder, (1, to which is screwed the elbow D and pipe D, carrying thegas, as previously mixed, to the gas-holder. The part A rests on theretort, from which it receives sufficient heat to prevent its clogging.The part A has placed within it a vertical diaphragm, a, having twosegmental openings at an equal distance apart, and formed like the valveshown in Fig. 3. At a is cast a cylindrical neck, extending back, whereit terminates in a cone, which receives the key E. This key extendsforward where it is provided with a square neck, 6, to receive theair-valve F, better shown in Fig. 3. This valve has two openingscorresponding to those in the diaphragm a, to which ithas been groundairtight. A spring, 6 held on by nut 0 serves to hold valve F to itsplace, and also to hold the conical key E in position, and taking up thewear in both. The key extends forward some distance, to within a shortdistance from the mouth of cylinder C, and is provided with a smallbore, 0 running longitudinally until it. arrives at 6 where it changesto a right angle so as to coincide with opening a which receives thetube G, supplying pure oilvapor from a retort not shown in the drawing.The bore, c is narrower at its outlet at 6 to increase the force of jet.The mechanism for operating the valve begins at the key E, whichreceives a pin, 6 In Fig. 2 is shown the position'of pin 6 when. thevapor and also the air-valves are open. When closed, the pin 6 willstand at the dotted line ey. At H is a vibrating arm having its fulcrumat the screw h, and is provided with two projections, h and h whichengage with pin cf; also aprojection, h", which engages with prongs iand i of the short arm of lever I. This leveralso has its fulcrum at h,butis slipped over the hub of arm H, and its long arm extends somedistance from where it is represented as broken off, where it isattached to the gas-holder. A coil-spring, J, housed within the cylinderK, acts against a plunger, L, which has an adjustable connecting-rod, l,extending to and joined to arm H by a screw, l ,-permitting the twoparts to flex. The cylinder K is pivoted at k, to keep it in positionand allow a lateral vibrating motion, corresponding to that of part H.

From the above, the operation of my invention becomes obvious. Thearrows of a sin- 'gle barb show the course of the air; those of fourbarbs, the course of the oil-vapor; and those of two barbs show thecourse of the gas after mixture. The cutoff F in the drawing isrepresented to have its two openings over the corresponding openings ofdiaphragm a, permitting a free passage of air, and the opening 6 and ccommunicating with that of a allowing the flow of oil-vapor through tubeG. As the vapor comes from the key E in a jet, it draws in and mixes acertain proportion of air therewith. The force with which the vapor,under compression, emerges from key E, owing to its construction abovedescribed, gives sufficient force of gas through tube D, leading intothe gas-holder, to elevate it to its uppermost point. In this upwardmovement it takes with it the lever I, from the line iw to that of t'y.During this movement the prong i, by its engagement with pin W, haselevated the arm H from line h m to a point a small distance beyond theperpendicular, having compressed the spring J and brought the cylinder Kalso to a vertical point. The projection It now engages with the pin 6When the point Z has passed the straight line between fulcrums h and 7c,the force of the spring will, through the connecting-rod I, force thearm H down until it arrives at the dotted line It 4, having in thismovement brought pin 6 from line 0 m to e y, where the vapor-passages aswell as the air-passages have been closed ofi'. At this point theplunger L has come in contact with a head screwed into end of cylinder70, and forms the stoppingpoint for arm H, and also of pin a. Thisstopping-point may be varied to give greater or less movement to key E,by turning the connecting-rod l in plunger L. "Whatever backaction theremay be in the gas from the weight of the gas-holder will further tend tohold the air-valve against its seat. thus forming a check-valve. Bothvapor and air now being closed off, the gas-holder descends as the gasis withdrawn for use, moving the lever 1 down ward until it arrives inlinet'w, the tooth i having brought the arm H to a point a little beyonda perpendicular, when the action of the spring J forces the arm H toline h x, and

' by the engagement of projection h with pin moves it from line a y to e00, where the oilvapor openings and air-openings all come respectivelyin line, when the gas-holder is again filled, as before mentioned.Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

'1. The cylinder 0, having diaphragm a. and

valve F, in combination with pipes to O and oil-vapor supply mechanism,substantially as and for the purpose hereinbefore described and setforth.

2. The cylinder U, having diaphragm a and valve F, and air-supply pipea, in combination with the valve-plug E, and the mechanism hereindescribed for regulating the supply of gas, substantially as and for thepurpose described and set forth.

3. The oil-vapor valve-plug E, having the bore 0 e, and contractednozzle 6 in combination with oil-vapor supply-pipe, G, substantiall y ashereinbefore described and set forth.

4. The mechanism for operating and regulating the valve, composed oflever I connected with the gas-holder, the arm H having projectionsh kengaging the pin e, the connecting rod l and the spring J, substantiallyas hereinbefore described and set forth.

5. The combination of the adjustable connecting-rod l with the arm H,spring J, and piston L, substantially as hereinbefore described and setforth.

L. D. TOWSLEY.

Witnesses:

J. L. WARTMANN, WM. H. SCHLATER.

